The interaction of laser radiation in the picosecond and femtosecond regime with fused silica, quartz, BK7-glass and sapphire has been investigated. The optical emission and cracking is investigated on the time scale of 70 fs - 500 ns by high-speed photography, time-resolved spectroscopy and time-resolved Normarski microscopy. The morphology of the cracks is evaluated ex-situ using Normarski microscopy.
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